This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -2 |
| 2 | 1 |
| 3 | 4 |
| 4 | -5 |
| 5 | 1 |
| 6 | -8 |
| 7 | 18 |
| 8 | -8 |
| 9 | 1 |
| 10 | 16 |
| 11 | -56 |
| 12 | 41 |
| 13 | -11 |
| 14 | 1 |
| 15 | -32 |
| 16 | 160 |
| 17 | -170 |
| 18 | 73 |
| 19 | -14 |
| 20 | 1 |
| 21 | 64 |
| 22 | -432 |
| 23 | 620 |
| 24 | -377 |
| 25 | 114 |
| 26 | -17 |
| 27 | 1 |
| 28 | -128 |
| 29 | 1120 |
| 30 | -2072 |
| 31 | 1666 |
| 32 | -704 |
| 33 | 164 |
| 34 | -20 |
| 35 | 1 |
| 36 | 256 |
| 37 | -2816 |
| 38 | 6496 |
| 39 | -6608 |
| 40 | 3649 |
| 41 | -1178 |
| 42 | 223 |
| 43 | -23 |
| 44 | 1 |
| 45 | -512 |
| 46 | 6912 |
| 47 | -19392 |
| 48 | 24192 |
| 49 | -16722 |
| 50 | 7001 |
| 51 | -1826 |
| 52 | 291 |
| 53 | -26 |
| 54 | 1 |